Weighing scale



Nov. 10,1925.A 1,561,048

H. s. BERGEN WEIGHING SCALE Filed Feb. 25, 1920 Patented Nov. it?,

1,551,048 Perser Hanny s. BERGEN, on TOLEDO., omo, assignee 'ro 'roanne seats. Corin/inv, on

mienne, onIo, A conronArronon nnwrnnsnv.

Wsieeme scena palpation filed, lebfinrr ,25, 1,920- Srfiallo. 25.1.1.5?

Tov all whom 'it may conce/m.'

Be it known that I, HARRY IS.. BERGEN, a citizen of the United States, residing at Toledo, in the county of Lucasand State of Ohio, have inventedcertain new and useful Improvements in wWeighing Scales, of which the following is a specification.

rlfhis invention relates particularly to counter scales of the type having two pansv such as are commonly used in drug stores,

andl one Vof the principal objects ofthe invention is. to increase 'the s ensitiveness and accuracy of the weighing mechanism',

@ther objects and advantages will be ap,-

parent from the following description, in

which reference is had to the accompanying drawings illustrating a preferred embodiment of my invention and in which similar reference numerals designate similar parts throughout the views.

in the drawings:

Figure 1 is afront elevation of a scale enibodying my invention; and 4 Figure 2 is a sectional plan View of the saine taken substantially on the line 2-2 of Figure 1, and with parts omitted for the salie of clearness.

Referring to the drawings in detail, the base 1 oi the scale isisupported upon adjustable feet 2, areiferably three in number, and carries near each of its ends a pair of fulcrum stands 3. Fulcrumed adjacent one end upon bearings in the fulcrum stands 3 are oppositely-extending levers 4 and 5, the fulcrum ends of which are bifurcated, as shown in Figure 2, for the purpose of 0btaining lateral stability, and the free ends of which are provided with lateral eXtensions 6 and T carrying upturned knife edge load pivots to support the pan spiders 8 and 9. Counterpoise and commodity pans 10 and 11 are carried upon the spiders 8 and 9, which are provided respectively with downwardly-extending stems 10cnt and 11a, the lower ends of said stems being pivotally connected to check links 12 and 13. The check links 12 and 13 are pivoted respectively to short brackets 14 and 15 which are secured to the base 1 of the scale directly beneath the ares of the lever fulcrums. The pans 10 and 11 are thus maintained in horizontal position as they move upwardly and dow wardly during weighing operations. The mechanism so far described, with the exception of the pans and spiders, is enclosed within a hing-likey housing 16l which is suitably secured tothe base 1.

Secured upon the housing 16 is a substantially fan-shaped upright casing y1T, and swingingly suspended within the casing 17 is a penfflul'um "1S comprising a heavybob 19 and 'Stem 20- @Prestar-extending power Sectors 2l and 2,2 arergidlysecured tothe pendulum 18 to swing therewith'and these power sectors are connected resp'ec# tively to the levers 4 and 5 by means of faible Steel bands 01 obtiens. 23,. @1.524, as clearly shown in `Figure 1. Thus, when the free end of the lever 5 is moved downwardly a pull will he exerted through the ribbon 24l upon the power sector 22, causing the penduiuin 18 to swing to the lett, thereby creating an upward pull upon the ribbon 23 and the free end of the lever 4.

'Ehenpper portion of the fan-shaped casing is. profvided with a window which displays the graduated chart 25, and an index' 2G is rigidly secured'to the pendulum 18 and arrangedto swing over the chart 25 when pendulum swings to the left.-V

El, creer to. prevent undue Vibration. 0i the weighing mechanism, the dash. pot 27 adapted to contain a fluid such, for example, as hydro-,Carbon oil. is Centrally mounted 11190.11 the bas@ l, and a recipecaties dash. not plunger co-operating therewith i's connected by means of the link 28. to the lever 5.

In operating the scale when the com modity to be weighed is placed in the pan 11 at the right side of the scale, the free end of the lever 5 is depressed, creating a downward pull on the ribbon 24 and swinging the pendulum 18 to the left. The index hand, being rigidly attached to the pendulum, is moved to the right until the weight of the commodity is indicated upon the chart 25. Should the weight of the commodity be suiiicient to swing the pendulum and attached index to a point beyond the capacity of the chart 25 a counterbalancing poise may be placed in the pan 10, thereby depressing the free end of the lever 4 and acting through the ribbon 23 and power sector 21 to swing the index to the left. rThe weight of the commodity in the pan 11 is then found by adding the weight of the poise in the pan 10 and the weight indicated upon the chart 25.

`When used as a predetermined weight scale the index 26 is so secured to the pendulll) lum 18 as to extend vertically when there is no load on the scale. A poise of the desired Weight is then placed upon the pan l0 and the article the Weight of which is tobe checked is placed upon the pan 11. It the weight of the article is exactly right the index Will remain in vertical position. If the article be under-Weight the index Will swing to the left correctly indicating the amount of the deficiency. It the article be over-Weight the index Will swing to the right correctly indicating the amount ot' the over-Weight.

IVhile it Will be apparent that the illustrated embodiment of my invention herein disclosed is Well calculated to adequately ultill the objects primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope ot the subjoined claims.

Having described my invention, I claim:

l. In a scale, in combination, a pair ot' oppositely-extending levers lying substantially side by side, each of said levers being :'Lulerumed at one end and provided at its other end with load pivots, torce-transmitting means connected to each oi' said levers. intermediate its ulerum and load pivots whereby a. load on one lever may be counterbalanced by an equal load on the other lever, and means connected to and connecting said force-transmitting means to offset an excess of load on one of said levers.

Q. In a scale, in combination, a pair ot oppositely extending levers lying substantially side by side, each of said levers being ulcrumed at one end and provided at its other end With load pivots, Jforce-transmitting means connected to each of said levers intermediate its iulcium and load pivots whereby a load on one lever may be counterbalanced by an equal load on the other lever, and means connected to and connecting said force-transmitting means to offset an excess or load on either of said levers.

8. In a scale, in combination, a pair of oppositely-extending levers lying substantially side by side, each of said levers being ulcrun'ied at one end and provided at. its other end with load pivots,I force-transmitting means connected to each of said levers. intern'iediate its 'tulcrum and load pivots whereby a load on one lever may be counterbalanced by an equal load on the other lever, and pendulum means connected to and connecting said toree-transniitting means to oiiset an excess et' load on either of said levers.

la In a scale, in combination, a pair of oppositely-extending levers lying substantially side by side, each ot said levers being ulcrumed at one end and provided at its other end with load pivots, force-transmitting mea-ns connected to each of said levers intermediate its tal-Crum and load pivots whereby a load on one lever may be counterbalanced by an equal load on the other lever, and a normally plumb pendulum connected to and connecting said torce-transmitting means to oil'set an excess ot' load on either ot said levers.

5. In a scale, in combination, a pair ot oppositely-extending levers lying side by side, each of said levers being fulcrumed at one end and provided at its. other end with load pivots, and a normally plumb pendulum oppositely connected to said levers intermediate the fulcrum and load pivots thereof.

HARRY S. BERGEN. 

